Does anyone have an SM420 in good working condition they would sell? Or a source for parts? I need a slider and 3rd gear synchro. Harry's Transmission in Denver said they don't have those parts.

TIA

treerootCO

09-11-2009, 11:30 AM

http://www.novak-adapt.com/catalog/sm420_parts.htm

Probably others out there but I have ordered from these guys before.

You also may want to look into adding a seal to the output shaft. The SM420 dumps gear lube all over your clutch if you point the truck downhill. There is one on that page but if I remember right, you can swap an SM465 one over with a little bit of machine work.